ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,493,230, issued on Dec. 9.
"Camera rotation device, monocular telescope, and rotation mechanism of monocular telescope" was invented by Chieh-Chou Yang (New Taipei, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A camera rotation device includes a connection tube, a rotation annulus, a resistance annulus, an oil film, and a driver. The rotation annulus and the resistance annulus are respectively sleeved at two opposite sides of the connection tube and are fixed to each other. The connection annulus includes a resistance portion, and the rotation annulus has a plurality of teeth in a ring-shaped arrangement. The oil film is arranged in a space surr...